9 6 



SMITHSONIAN INSTITUTION 



kd&^^y 



Fig. ioo. — Ridge bearing- stone enclosures ; Missouri River in background. 



Fig. ioi. — Cross-section of burial enclosure, Nolan mound C. 



Fig. 102. — Xolan mound C, partially excavated. Note square burial chamber 

 opening toward south ; also large leaning slabs and outer sheath of earth 

 and stones. 



